

2021 № 11 (653) p. 1061–1148
Table of Contents
Review Articles
PYRAZOLES, ISOXAZOLES, AND 1,2,3-TRIAZOLES AS ANALOGS OF THE NATURAL CYTOSTATIC COMBRETASTATIN A-4: EFFICIENT ROUTES OF SYNTHESIS, TUBULIN INHIBITION, AND CYTOTOXICITY |
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Роман К. Костин, Александр С. Маршавин | 1061-1072 |

Heterocycles in Focus
SYNTHESIS OF 2H-THIOCHROMENE DERIVATIVES |
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Seyed Sajad Sajadikhah, Mahmoud Nassiri | 1073-1075 |

SYNTHESIS OF HETEROCYCLIC RING-FUSED QUINONES |
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Anastasija Gaile, Nelli Batenko | 1076-1078 |

Original Papers
REACTIVITY OF ALICYCLIC 1,5,9-TRIKETONES TOWARD FIVE-, SIX-, AND SEVEN-MEMBERED RINGS IN ACIDIC MEDIUM. STEREOCHEMISTRY OF INTRAMOLECULAR CYCLIZATION PRODUCTS |
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Таисия И. Акимова, Ольга А. Солдаткина, Андрей В. Герасименко, Вячеслав Г. Савченко, Алевтина А. Капустина | 1079-1085 |

AZIRIDINE-2-CARBOXYLIC ACID DERIVATIVES AND ITS OPEN-RING ISOMERS AS A NOVEL PDIA1 INHIBITORS |
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Irena Leite, Victor Andrianov, Diana Zelencova-Gopejenko, Einars Loza, Iveta Kazhoka-Lapsa, Ilona Domracheva, Marta Stojak, Stefan Chlopicki, Ivars Kalvins | 1086-1106 |

[3+2] CYCLOADDITION REACTIONS OF 1-SUBSTITUTED 3,3,3-TRIFLUOROPROPENES WITH DIAZO COMPOUNDS AND NITRILIMINES – SYNTHESIS OF PYRAZOLINES AND PYRAZOLES |
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Юрий Н. Маркитанов, Вадим М. Тимошенко, Сергей С. Михайличенко, Эдуард Б. Русанов, Александр И. Хижан, Юрий Г. Шермолович | 1107-1115 |

SYNTHETIC TRANSFORMATIONS OF SESQUITERPENE LACTONES. CONTROLLABLE SYNTHESIS OF 11,13-DIHYDROISOALANTOLACTONE AZIDES AND 13-(1,2,3-TRIAZOLYL)EUDESMANOLIDES BASED ON SESQUITERPENE LACTONES |
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Сергей С. Патрушев, Татьяна В. Рыбалова, Эльвира Э. Шульц | 1116-1129 |

LEWIS ACID CATALYZED CONDENSATION OF 2-AMINOHETARENE N-OXIDES WITH N,N-DIMETHYLFORMAMIDE DIMETHYL ACETAL |
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Сергей А. Каралаш, Дмитрий М. Быстров, Иван В. Ананьев, Леонид Л. Ферштат | 1130-1136 |

SYNTHESIS OF METHYL(ETHYL) PYRAZOLO[4,3-b]PYRIDINE-6-CARBOXYLATES AND THEIR CONVERSION TO tert-BUTYL 4,5,6,7-TETRAHYDROPYRAZOLO-[4,3-b]PYRIDINE-6-CARBOXYLATES |
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Георгий Г. Яковенко, Леся Н. Салиева, Эдуард Б. Русанов, Илья С. Дончак, Михаил В. Вовк | 1137-1145 |

Short Communications
SYNTHESIS AND PERMETHYLATION OF METHYL 5-(2-CHLOROPYRIDIN-3-YL)PENTANOATES |
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Franziska Bendrath, Peter Langer | 1146-1148 |

Latvian Institute of Organic Synthesis - Aizkraukles iela, 21, Riga, LV-1006, Latvia - hgs@osi.lv